With this connection the load is powered only when all switches are closed. The number of switches which can be connected
in this way is limited by three factors:
1) from the residual voltage drop typical of selected switch, which is 2,2V (max for some types) at maximum load current;
2) from the maximum load current of switches employed, because it’s important to consider that the self consumption of each
sensor must be added to the final load.
3) from the delay time of availability. For each sensor there can be a maximum delay of 30 ms. which has to be multiplied for
the number of sensors used.